Safety apparatus for steam-boilers.



H. NEVILLE. SAFETY APPARATUS FOR STEAM BOILERS.

AiYLIOATION I ILBD 3130.8, 1910.

Patented Ja n 23-, 191 2 2 sums-sum 1.

arrow H.- NEVILLE.

SAFETY APPARATUS FOR STEAM BOILERS. I 7 APPLICATION FILED DEC. 8, 1910.I

- 0.15',703 I v Patented'Jan.23,1912.

. 2 HEETS-SHEET z.

31?..5" if v 12! I 5 8141mm foz UNITED srarn's PA ENT OFFICE, r

HARRY NEVILLE. OF LOS ANGELES, CALIFORNIA, ASSItii-NOR OF ONE-FIFTH TGEORGE H. GOODWIN, ONE-FIFTH TO DANIEL P. KELLOGG, ONE-FIFTH TO WILLIAMF. MERRY, AND ONE-FIFTH TO PATRICK SHEEDY, ALLOF LOS ANGELES, CALI-FORNIA.

To @22 whom it may concern.- 7

Be it known that I, HARRY NEVILLE, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, has invented certain new and useful Improvements in SafetyApparatus for Steam-Boilers; and I do declare the following to be afull, clear, and

.more efficient.

\Vith these and other objects in view, the invention conslsts ofCGI'tilll'l' novel features of construction, combination and arrange-'ment of parts as will be more fully described and particularly pointedout in the appended claims.

In the accompanying drawings: Figure 1. is a front View of a portion ofa locomotive boiler showing the invention applied thereto;

Fig. 2 is a side viewv of the same with parts broken away and insection; Fig. 3 is an enlarged central vertical section of the steamcontrolling valve and means for automatically opening the same to admitsteam to the alarm and tire controlling mechanism; Fig. 4 is a crosssectional view on the line of Fig. 3; Fig.5 is a'similar View on theline 5-5 of Fig. 3.

' Referring more particularly to the drawings, 1 denotes 'a steam-boilerwhich is here shown as being heated by an oil burner. 2.-

Arranged on the boiler atany suitable'point is my improved-automaticalarm mechanism, said mechanism beingshown in the present instance asarranged on the front of the boiler and connected thereto at a pointwhich SAFETY APPARATUS FOR STEAM-BOILERS.

Specification of Letters Ela tent. Patented J an; 23,1912, Applicationfiled December 8, 1910. Serial No; 596,304.

cally disposed water and steam circulating passage 6 which is connectedat its upper end to the cylinder 3 by a passage 7 and at its lower endis connected to theeylinder by .apassa'ge 8. The passages 7 and 8 openthrough the outer sides of the wing and are interiorly threaded asshown. In the threaded end of the passage 7 is arranged a plug 9 Whileto the threaded end of the passage 8 is connected a steam and water pipe10 leading to and connected with the boiler at its low water point. Inthe pipe 10 is arranged a valve 11 whereby the apparatus maybe out 01ffrom the boiler. The lower end of the cylinder 3 is closed and hasformed therein a threaded blow oil passage 12 with which is connectedthe upper end of a blow off pipe 13 in which is arranged a valve 14. Theblow "off port and pipe are provided to permit any sediment or foreignmatter to be blown out of the cylinder and the latter thus kept clean.The passage 6 serves as a receiving chamber for such steam as may escapewhen byreason of the swaying of the locomotive the water momentarilyuncovers the pipe 8. Thissteam will pass into the annular space aroundthe mercury cup 16 but owing to the presence of the air space betweenthe ,duct 6 and the cup, the temperature of the steam will be reducedsufii'ciently to'preventexpansion of the mercury until the Water hasuncovered the pipe 8 for a sufiiciently' ldngf period to warrant action.The upper-openendof thecylinderi I isthreaded and in thesameris screwedthe enlarged "open upperyend 1533f v aimercury holding cup "16whiclrprojects downwardly in the cylinder 3 to near'thelower endthereof. Thee-up 16.is-ofilessdiameterthan the cylinder thereby forminga passage or'space around between the, same and the cylinder.

annular flange 17 which when the head is y '95 On the head 15 of thecylinder'fis formed an screwed'down'i'nto the cylinder comes intoengagement with the upper end of the latter and thus forms a tight jointbetween the has-been determined upon asa low==water level. p y I Mymproved illil lfll'lllChEt-IHSITI comprises a steam and water cylinder3' havin -on onev 'der from the lug 4. is formeda' wing or extension'ehaving formedtherein a vertihe'ad of the cup and the cylinder. The cup16'is' threaded fiear'its'upper end as at 18' and above saidthreadedportion isenlarged to form a shoulder 19 above which the upand 1 saidenlarged 'bore threaded as at 20. Screwed into engagement with thethreaded bore 20 of the upper end of the cu is the per end of the cup isstill further enlarged reduced threaded lower end"of a steam valve casin'21 in which is arranged a valve seat 22 a apted to be engaged by asteam con+ trolling valve 23. The valve casing 21 is 6 provided with asteam inletpassage 24 and a steam discharge passage 25. With the passage24 is connected a steam conducting pipe 26 leading to and connected witha. steam dome 27 or other point from which steam may be taken from theboiler. In the pipe 26 is arranged a cut oft valve 28. -With' the steamdischarge passage is connected steam conducting pipes 29 and 30, thepipe 29 of which-extends to and is connected with 15 an alarm whistle 31arranged at any suitable point while the other pipe leads to and isconnected with a sultable operating mechanism 32 for controlling thefuel supply valve of the burner. The construction 2 oithe valvecontrolling mechanism "32 forms .no part of the present invention and isnot therefore illustrated in the drawings.

' The stem 533 of the valve 23 projects downwardly in the casing 21through astufiing' 2 100x34 arrangedinsaidvalve casing 21. The head ofthe packing nut 35 ot' the stufiing 'box 84 projects into an open cage36 formed on the lower portion of the valve casing 21 and in said headof the nut is formed an 39 annular series of vertical notches 37 whichmay be engz'iged through the open cage 36 by a spanner to adjust thenut. The lower end or the stem 33 of the valve 23. projects through thepacking nut 35 and into the cage 36 as shown. In the lower end of thevalve stem is formed a threaded socket 38 into which is fitted an,adjusting screw 39 by lneansofwhich'the stroke of the valve a stem isincreased or diminished. The screw 39 islockcd in itsiadjusted positionsby a jam nut 40 arranged on the lower "end thereof as'shown. f v

' Arranged in the lower end orca-ge 36 of j the-valve casin 21 andhaving a threaded engagement at 1ts lower end with the upper portion 18of the mercury cup 16 isa p1ungeror piston cylinder 41 on which'isformed an annular flange 42 which, whenthe cylinder 41 is screwed down"into the up er end 0 of the cup 16, engages the Tshou. der'f 19formed-at the end oi the threaded port-ionv 18 ofthe cup asshownQSlidably mounted in the cylinder-411st]. piston'or plunger 43 theupperflend of which works through a' stufling box 44 arranged on theupperend :of the cylinder41. ,On the upper end of. the plunger orpiston/13 is arranged a brass bushing 45 the gipperiend of whichprojects] through thestu ng hox 44 and engages the,"

6.0 lower end ofthe valve stem adjusting screw 7 Q 39 wlierebywhen theplunger is forced upwardly inthe cylinder 41 the valve 23 will be liftedfromlts seat 22 and steam thus '1 permitted to pass throughftl 'ei-valvecasing Q from the steam" conducting pipe 26 to the lv v steam conductingpipes 29-and 30 to sound the alarm and actuate the fuel valve operatingmechanism. g

It will be observed that between the -pis ton 43and the body ofmercury-is an" 1m? 7 occupied space whereby the-mercury is per mittedto-expand somewhat without'actu ating'the piston. 2 The timeexpansionjprovided for by the peculiar arrangement of the passages 6 7and 8 .is thus accentuated 7 5 so that there will be no frequent, andunnecessary sounding of the alarm asthe water titfullynncoszers-the pipe8 under the sway- 111%0f the locomotive. ,7

he stufiing box 44 isprovided with an adjusting cap nut 46 in which isformedau annular series of vertically disposed notches 47 which, throughthe'open ea c 36;"mey be engaged by a spanner toe ectadjtiSt ment'of thenut. With the, notches 37*of the packing adjusting nut 35 of,tlie'stufiing box 34 and the notches 47,-of the adjusting cap 46 are enaged spring projected locking dogs 48 whici' are slidably mounted hollowplugs 49 arranged in one side-of'the cage 9 .36 as shown.-v--'-The dogs48 are provided with reduced stems 50 around which are coiled projectingsprings 51 arranged-in the outer ends of the plugs 49 whereby said dogsare forced inwardly into engagement 5 ,with the notches 37. and 47 ofthe packing ;a djusting nuts 35 and 46 to'lock the same against casualloosening or unscrewing. Inf the upperend of the cup 16 is formed adrain passage 52 which communicates with m the space between the upperend of the cup and the valve casing 21 thus permitting any water whichmight otherwise accumulatein this space to escape therefrom. t I ,In theupper end of the valve casing 21 is formed a-- threaded opening in whichis screwed a cap 53 having formed therein a cent-rally disposed guidepassage 54 in which is slidably mounted a valve closing plunger '55 theupper'end of which works through" i a stufling box 56, arranged in theupper end 'of the cap, and pro'ect's a suitable distance above thestuffing hox as shown. On theupper end of-the cap 53 is arranged ahearing bracket 57 with which is pivotally c0n in'ec ted theinner end ofa plunger operating lever 58which extends across the upper end of thevalve closing plunger fiywhereby when said lever ispulled downwardly thevalve 23 will be closed against itsseat 22, "thereby cuttingoif thesupply of steam to the whistle and fuelcontrolling mechanism. 1 In-th'eouter end of the lever 58 isform'ed a hole 59 in 'which is connected theupper end a an operatipig chain 60. said chain extending downwar' y towithin convenient reach of the attendant whereby' hej may close the"valve 23 after the parts have been operated to sound the alarm." t I30It will be noted that the apparatus is It! catcd entirely outside theboiler and exposed to the atmosphere which arrangement is an importantfeature in connection with the operation of the device.

In the operation of the apparatus a sufficient quantity of mercury isplaced in the mercury holding cup 16 and the valve opened which,-undernormal conditions, will.

permit the water from the boiler to pass through the passage 8 into thecylinder 8 to fill the latter and the'passages 6 and 7. The

'water thus let into the cylinder 3 will be the steam has thus enteredthe cylinder the water level to both admit and discharge wa- -5O .heatthereof will be suflicient to cause the mercury in the cup 16 to riseinto engage- ;ment with the piston or plunger 43 thereby forcing thelatter upwardly into engagement with theadjusting screw 3 of the valvestem 33 and consequentlyylifting the valve 23 out of engagement withitsseat'22 whereupon steam from the boiler will pass through thevalvecasing for the purpose described.

' From the foregoing description taken in connection with theaccompanying draw ings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various "changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any ofthe advantages of the invention as defined in theappended claims.

Having thus described my invention, what I claim is:

1. -A device for the purpose set forth com prising a cylinder having asingle port communlcating with a steam boiler at the low ter and steam,a cup arranged in said cylinder closed against the same and arranged tobe acted upon by both the water and the steam, a heat expansible liquidin the cup, a

steam valve and a plunger acted upon by said heat expansible liquid toactuate the valve.

2. A device for the purpose set forth comprising a cylinder having asingle port communicating with a steam boiler at the low water level toboth admit and discharge wa ter and steam, a cup arranged in said cylinder closed against the same and arranged to be acted-upon by both thewater and the steam, a heat expansible liquid in the cup,

valve casing threadedin the upper end of the 3 p, a valvehn the casinghaving a dependlng stem, a piston casing in the cup below'the valvecasing, and a piston in said casing above the expansive liquid and onpurpose set forth gaging the valve stem.

3. A device for the comprising a cylinder having a port to admit steamand water, a cup arranged in said cylinder and closed thereto, said cuphaving on its upper end an interiorly and 'exteriorly threaded head, theexteriorly threaded portion'of said head engaging the upper end of thecylinder, at heat-responsive element in the cup, a valve casing havingan open cage on its lower end, said cage having a threaded engagementwith the interiorly threaded end of the cup, a valve arranged in saidcasing and having a down wardly projectim stem, an adjusting screw inthe lower end of said stein, a cylinder having a threaded engagement inthe upper end of the cup, and a piston controlled by theheat-responsive?element and slidably -mounted in said cylinder to engagethe adjusting screw in said valve stem whereby to lift said stem and itsvalve.

4. A'devic'e for the purpose set forth comprising a cylinder having aport to admit a heating medium, a cup engaged therein and closedthereto, said cup having an exteriorly and interiorly threaded headengaging the upper end of the cylinder, a heat-responsive element in thecup, a valve casing provided on' its lower end with an open cageengaging the interiorly threaded end of the cup, a valve in said valvecasing having a downwardly projecting stem provided in its lowerextremity with a threaded socket, a regulating screw fitted in saidsocket, a cylinder secured in the upper end of the cup and projectinginto the cage, a stufling box arranged on the upper end of saidcylinder, a piston slidably mounted in said cylinder and stuffing boxand controlled by the heat-responsive element, a bushing arranged on theupper end of said piston to engage the regulating screw whereby to liftsaidstem and valve, an adjustable packing nut in Saidstufiing' boxprovided with an annular series ofnotches, and a spring-projectedlockingpin engaged in said cage and adapted to engage said notcheswhereby to hold the nut in its .,adjusted position.

5.'A device for the purpose set forth comprising a cylinder adapted toreceive a heating medium, a cup arranged therein and closed thereto, aheat-responsive element in said cup, a valve casing connected to theupper end of said cup, a cut off "alve arranged in said casing andhaving a downwardly projecting stem, a cylinder arranged inthe upper endofsaid cup and within the valvecasmg, a pistonslidably mounted in saidcylinder'in osition to engage said stem and controlled y theheat-responsive elesaid valve casing,

4 ing upon the upper end of said plunger.

, 6. A device of the character described,

comprising a cylinder, a cup in thecylin- .der' arranged to provide aacket space surrounding the cup, a circulating space being providedoutside the jacket space, a steam and-water pipe from a steam boiler atlow water level leading into the jacket space and communicating with thecirculating space and the jacket space at its lower end,

a passage being also provided connectingthe two spaces at the top, asuperposed valve casing, a steamvalve therein, a depending stem, and aplunger acting on said stembeing arranged in vertical alinement abovethe cup and the cup beingprovided with an expansive liquid toact on thelower end of the plunger.

7. The combination of a steam casing, a cup secured in said casing andclosed thereto, an expansive fluid in said cup, a valve casing'risnigfronrthe steam casing, a cutoff valve within the valve casing, a stemdepending from the valve and mounted to slide Within the valve casing,means whereby the expansive fluid will reciprocate said stem, a packingbox fixed within the casing and forming a guide for the reciprocation ofsaid stem, a nut on said box having notches in its outer surface,and aholding pin mounted in the side of the valve 'casing and movablelaterally thereto to engage said notches.

8. The combination of a steam cylinder having but a single portleading'from a boiler at low water level to admit and discharge steam orwater, a cup secured in and closing'the upper end of the cylinder andclosed to the steam or water in the oylin der, a heat responsive liquidin the cup, a valve casing rising from the cup inaxial alinementtherewith, a guiding cylinder 'se'- cured in the upper end of the cupand projecting into the lower end of'the 'valve cas- 1ng, a lifting pinin said. guiding cylinder actuated by the heat responsive element, anormally seated valve in the valve casing,

and a stem depending from said valve and having its end in proximity tothe upperend of the lifting pinto be operated thereby.

9. In mechanism of the character described, a shell containing therein aheat expanding element and connected up with a boiler'at its normal lowwater line, a valve in a steam line operatively connected up with theheat expanding element, and a valve stem, adjusting screw and plungerbetween said heat expanding element and valve for adjusting the saidvalve and timing its operation.

10. In mechanism of the character described, a shell containing thereina heat expanding element and connected up with a. boiler at its normallow water line, a stem actuated by said heat expanding element, a valveprovided with a stein operatively in. engagement with said heat"actuated stem, a valve stem, adjusting screw and plungerbetween thevalve and heat expand ng elementfor adjusting said valve, and means forlocking'the valve stem.

1.1. In. mechanism at the character described, a shell containingtherein a heat expanding element and connected up with a boiler at itsnormallow water line, a stem actuated by said heat expanding element,the shell having openings above the heatexpanding element, a valve inthe shell above the openings, a stem projecting downwardly from thevalve in line with the stem of the heat expanding element, and a screwprojecting from oneand contacting with the end of the other of saidstems, whereby the valve may be adjusted:

12. The combination with a locomotive boiler, of a shell, a cup withinthe shell spaced annularly therefrom, a heat-responslve element in saidcup, a valve actuated by said element, a pipe leading from the lower endof the shell to the boiler, a pipe leading from the upper end of theshell, and 'a branch pipe connecting the ipes leading from the upper andlower en s of the shell and spaced from theshelh In testimony whereof Ihave hereunto set my hand inpresenceof two subscribing witnesses.

v HARRY NEVILLE.

Witnesses: I

ARTHUR S. PREN'mon, EDWARD I. BRYAN'r.

' Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, 1 Washington, G.

